Hoisting-gear for glass-drawing apparatus.



No. 871,687. PATENTBD NOV. 19, 1907.

R. L. FRINK. HOISTING GEAR FOR GLASS DRAWING APPARATUS.

APPLICATION FILED MAR. 8, 1906.

SHEETS $HBET 1.

WITNESSES PATENTED NOV. 19, 1907.

R. L. FRINK. vL1G GEAR FOR GLASS DRAWING APPARATUS.

HOLE

APPLICATION FILED MAR. 8, 1906.

4 SHEETS-SHEET 2.

INVENTOR W x. $14K WITNESSES /nwww.

No. 871,687. PATENTED NOV. 19, 1907.

R. L. FRINK.

HOISTING GEAR FOR GLASS DRAWING APPARATUS. APPLIOATIONIILED MAB. a,1906.

4 SHEETSSHBET 3.

WITNESSES I INVENTOR rwm A {M PATENTED NOV. 19, 1907.

R. L. PRINK. HOISTING GEAR FOR GLASS DRAWING APPARATUS.

APPLIOATION FILED MAR. B, 1906.

4 SHEETS-SHEET 4 I INVENTOR 4% fi r ymufa wrmzssss nnrrs snares rrirnn rent re.

ROBERT L. FRINK, OF BELLE VERNON, IE NNSYBVANIA, ASSIGNOR TO \YlhlDOWGLASS MACHINE COMPANY, QF PTTTSBURG. PENNSYLVANlA, A CORPORATION OF NEWJERSEY.

HOISTING-GEAR FOR GLASS-DRAWING APPARATUS.

Specification of Letters Patent.

Patented Nov. 19, 1907.

Applicationfiled March a. 1906. serial-No. 304.88?

To all whom it may concern;

Be it known that 1, ROBERT L. FRINK, of

Belle Vernon, Fa ette county, lenns lvania,

have.invented a new and useful Hoisting- '(lrear for Glass DrawingApparatus, of Winch the following is a toll, clear, and ex- Fig. 3 is anend view partly in scctionoi" the same; Fig 4 is an end view of myimproved hoisting drum; and Fig. 5 is a side view of thesame.

:In the operation of drawing glass, it is i well known'that the speed atwhich the drawing operation is carried on varies very largely duringdillerent portions ol the drawing operation. ,Thus, in drawing acylinder, the operation is at a comparatively low speed; while the neckportion of the cylinder is being drawn. The speed is again increased forthe formation of the cap portion of the cylinder, and there is a furtherincrease while the body of the cylinder is bein drawn. To secure thebest results the speed should also be varied so as to increase as theglass cools. In other words the increase in speed should be proportionalto the decrease in temperature of the. glass. It has been dillicultheretofore to properly control the speeds by reason of the dilliculty incontrolling the motor with sulllcient accuracy and at the proper timesThe object of my invention is to provide means by which the speed atwhich the drawing operations are carried onshall be automaticallycontrolled. This 1 accomplish by the provision of .a hoisting drum uponwhich the rope or cable from the drawmg apparatus is wound, and whosewinding surface is so constructed as to give the required variation inspeed. I

My invention also consists in the provision of simple and ell'cctivemeans for automatically controlling the lowering of the glass-after ithas been drawn; also in the novel construction, combination andarrangement of the parts all substantially as hereinafter describedand'pointed out in the "ap ended claims. n the accompanying drawings,the numeral designates glass drawing apparatus of the usual characteroperated by the rope or cable 3 leading to the hoisting mechan ism.

A in Fig. 1 designates a partially drawn glass c linder,

In accord ance witlrmy invention, 1 provide the hoisting gear with awinding drum 4, to which the rope or cable '3 is connected. This drumhas a portion 4 of small diameter, a conical portion 4* of greatlyincreased diameter, and an intermediate connecting portion 4, the threeportions carrying a conti nuous spiral groove 5 for the cable 3. Thisdrum may be driven. by means of any suitable arrangement of gearing. Inthe drawing 1 have shown for this purpose an electric motor-.6 whoseshaft 6 carries a spur pinion 7 meshing with a lar c gear wheel on aparallel shalt 9. The s raft 9 carries a worm 10 which meshes with alarge worm gear wheel 11 which is rigidly secured to a shalt 12. Theshalt 12 has loosely nountcd thereon a gear wheel 14 which engages agear wheel 15 on the shaft 16 which carries the drum 4. The wheel 14isconnected to the shaft 12 through the medium of airiction clutch 13,said clutch preferably consistin of a series tion disks as shown in Fig.During the. normal drawing operation, these disks are by means of thespring 17. For the purpose of releasing this clutch l. preferably employcarried by'a lever 20 which-engages the sliding pressure headZl of theclutch. "When the ma net is energized it actuatcs the lever 20 andthereby the head .21 to release the trioclutch is fully described andclaimed in the application of H. W. .Hitner, E5erial No. 257,477, filedApril 26th, 1905. and forms no part of my present invention.

- The cable 3 has several idle turns around the reduced portion 4 of thedrum- 4. In commencingto draw a glass cylinder such as shown at A inFig. 1, the rope or cable 3 commences to wind on the portion 4 at apoint adjacent to the conneSc-ti'n' portion 4, thus giving a slow speed,while theneck 'portion of the cylinderis being drawn The cable thencommences towind. on the connecting portion 4, which -hassuch anincrease in radius as togive the exact increase in speed which isnecessary. to. formthe cap of alternately arranged fast and loose hie--held in driving engagement with each other tional engagement "of theclutch This an olectroanagnet 18 whose armature 19 is I portionfthe'cylinder. Whilethe cable is changin the speed of the driving motor;

winding on therernainder of the connecting portione the necessaryIncrease 1n speed is being obtained for the commencement of theformation of the body portion of the.

cylinder, after'which the cablewinds upon the conical portion 4* of thedrum 4. This portion is'preferably not'a true cone, but is curved in themanner shown in Fig; 5, which curve, together with the progressiveincrease in its diameter, is proportioned to bear a definite relation tothe decrease in temperamagnet 18is energized to release the frictionture of the cooling glass. The exact dimensions and proportlons of the wnding surfaces this drum must, of course, be determined .in each casewith reference to the particular object. being drawn. This can bereadily determined from the known speeds at which the different portionsof the drawing operations are to be conducted.

- Aftcr'the cylinder has been drawn, the

clutch iuthe manner before described, and the cylinder is lowered by itsown weight, the drum l revolving in the reverse direction. In order'toprevent undue speed being attained by the descending cylinder, I providethe automatic brake now to be described.

On the shaft 12 is a brake wheel 22, on the periphery of which is abrake band 23, the end portions of which are connected by means ofstraps with a projecting arm 26 of a rocker shaft 27. This shaft 27 hasan arm 28, which is engaged by a'collar 29 on a vertically movablespindle 30 which is arranged to be moved by. means of a centrifugalgovernorf3l. The governor 31 is driven through the gears 32 bynieans ofa shaft 33 V having a belt or hand wheel 34 connected by belt 35 with asimilar but larger wheel 36 on the shaft 12. By means of this gear thespeed of the governor will be proportioned to the speed of the shaft 16carrying the 4. If the speed becomes unduly great, the governor'actuates the rock shaft 27 and thereby tightens the brake band 23 onthe brake wheel 22, thus immediately checkingthe speed of the drum 4.

The advantages of my invention result from the simple manner in which Iam enabled to automatically regulate and control the speed of thedrawing operations without also in t. e means forautomatically'preventing the too-rapid descent of the drawn glass cyinder, as above'described.

What I claim 1s:--

1. In glass drawing apparatus, a drawing device, a rope or cableconnected thereto,

and a winding drum for said rope or cable creasing radius, and anintermediate portion.

of rapidly increasing radius; substantially as described. 1

4; In glass drawing apparatus, a winding drum, gearing for actuating thedrum, such gearing having a clutch-contrplled member, a fraction brakefor said member, and a governorfor controllin the friction brake; sub- Istafntially as descri ed.

5; In glass drawing apparatus, the combination with a winding drum,gearing for operating the drum, a friction brake for the gearing, and agovernor operated by the gearing and controlling the brake;substantially as described.

6. In glass'drawing apparatus, the com-- bination with a winding drumand caring for actuating the drum, said gearing iaving a loose membercontrolled by a friction clutch, of abrake Wheel, a brake band on saidwheel, a governor, and connections between the governor and the brakeband;

substantially as described.

In testimony whereof, I have hereunto set my hand. ROBERT L. FRINK.

Witnesses:

- H. M. CORWIN,

GEO. H. PARMELEE.

